Year	% of children ages 12-23 months
1980	27.726015214295483
1981	35.32897977965924
1982	37.51646001955899
1983	47.53945091911634
1984	55.025195098368165
1985	59.765248836318655
1986	63.539459364539226
1987	67.84685343255764
1988	68.62665636064716
1989	71.86483127702701
1990	79.36752898317691
1991	79.15347025916478
1992	79.96338260073794
1993	81.90770369141106
1994	83.89777296455091
1995	85.06905567868084
1996	86.72220804998176
1997	86.9913811523667
1998	86.67918394377607
1999	88.49947731874053
2000	89.16338479492721
2001	90.29559638140462
2002	91.28086035066059
2003	92.2546866089514
2004	92.69706794472576
2005	92.84977806685403
2006	93.68683056577616
2007	94.24957321251524
2008	94.26587264725191
2009	94.1918132650169
2010	94.07458360494914
2011	94.14402084697193
2012	94.65472252307664
2013	94.28408303922203
2014	93.95048337860185
2015	93.47509214679927
2016	93.52944528260048
2017	94.11244931269286
2018	94.2936060251091
2019	94.71257609442124
2020	93.23699587603491
2021	92.52686005265606
2022	91.93798601252159